/*
 * Copyright 2011 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.paymentexpress.server.decrypt;

import org.keyczar.exceptions.KeyczarException;
import org.keyczar.interfaces.KeyczarReader;

import com.google.paymentexpress.server.config.Config;

/**
 * Hardcoded Keyczar format RSA key and Meta data
 * Since Appengine doesn't support pull data from file directories
 * We have to manually pull the Keyczar keys and hardcode
 * 
 * @author pying@google.com(peng ying)
 */
public class KeyczarHardCodedReader implements KeyczarReader {

  //RSA Private Key in Keyczar format
  private final String RSA_KEY = Config.RSA_KEY;
  //RSA Private Key metadata in Keyczar format
  private final String META_DATA = Config.RSA_KEY_META;
  
  /**
   * Default constructor
   */
  public KeyczarHardCodedReader(){
  }

  /**
   * Returns the RSA private key String
   */
  public String getKey() throws KeyczarException {
    return RSA_KEY;
  }

  /**
   * The arg is unimplemented so this still returns the RSA private key String
   */
  public String getKey(int arg0) throws KeyczarException {
    return RSA_KEY;
  }

  /**
   * Returns the metadata string
   */
  public String getMetadata() throws KeyczarException {
    return META_DATA;
  }

}
